1: Canbus HID xenon for E90 series 2: 100% safe HID - never burn AUDI wipe engines ... hid kit already approved by customers to be passed BMW E90, AUDI A3, VW GOLF6...etc C08 Main Feature100% safe ... , let it can work on 95% cars, like BMW E90.100% garuteen for after sales, 18 month warranty.HID Ballast ... : four-time brightness than normal halogen lamp Canbus Doctor E90 HID ballast (Passed E90 2006 year)